Spark-plug



UNITED STATES. PA;

ANDREW L. Kurier; or Dnrnoni", mennen.. i

SPARK-PLUG;

Application mea 'october 24,1918. seriainaasaiiss.'

T all whom t 'may concern.'

Be it known that- I, ANDREW a citizen of the United States,

L. Kwok, residing at Detroit, county of Wayne, State of vMichi- Improvement in Spada-Plugs, and., declare- V.niting mixture 'in engines in the ordinary gan, have invented a certain new and useful the following to be a full, clear, and. exact description of tliesaine, such as' willenable otliersskilled-in theartto which it pertains tomake'and use the. same, reference being had to the accompanying drawings,

which forni a part 4of 'this specification.

My invention Vrelates to spark .plugs and' consists i'n. making a double .ended spark plug which can be readily Iadapted to be reversed so thatthe -upper or outer end can be substituted as a sparking device for igway.

In the. drawings: Figure l represents spa-rk plug as use. Fig. 2 isa vertical section pf the spark .plug as assembled. 4

Fig. is a verticalview of the porcelain la vertical view of the and core wire.'l

Fig. 4 is a cross section on the line 'of Fig. 2.

Fig. 5 shows an alternative means for aittaching the line terminal to the core wire.

Fien- 6 kshows an alternative` construction of the terminal connections to the corewiren,

Similar letters refer to similar parts. In the drawings A represents the'porce, lain of the core wire B. The porcelain has the shape shown in Fig. 3, the c'orewire .is

formed with a screw thread C at' eacli end, r

the two ends being' exactly alike. B is onehalf` of the ,metalparts, E is the other half. Thepart I) is screwed ontothe part E Fig.."2. Suitable gaskets G G are in-terposed between the metal shell and the porpurpose of 'making I have showni` one form of mea-ns for attaching the line wire which consists of an insulating sleeve H celain insulator forthe V them gas tight. At I-I slipped over the core wirev spreading out .from the core wire B and ignition ground J and interposed betweenit vand the core wire B. A' screw collar K is run-down on 'the core wire ad fastens the sleeve I-I inplace. Between that and thenut Lthe line wire may be attached inthe usual manner.A As an alternative construction means 'for at- Specicatien of Lett-ers IEateiit.V 'c-v Patented assembled and located for" i l' thumb down casing 'carrying these:

as shown at' F i'n taching. line to have provided' a collarM over 'therpipe thread the 'core wire. I

the core, wire which; the drawing,

wire forces from 'the lc ore wire;the groundwhich is screwed i N on the-'metalicasing carrying with it; an insulating piece P'over 60 has the Aferm shown' in this projecting- .over thev coi'eA terminal J' and'Qinsulates itf-therefrom. A I

thumb nut L holds the line terminal place'in the usual manner.

In `Fig..6I have vshown an alternative con- Inut Land nut, Securesl tothe contact' therewith;v :The

intofthe body 'of'.thegplug andis rawingM lis theisaine'cap as is shown isan insulating sleeve. and

Maand heldl outside .thread-, I ed at itsupper end and receives the thumb' also' the: terminalqK which the 'sleeve Smaking` sleev'e S extends 8b 4 knurledoutwardly lat its lower end vat T`to i hold the' insulating-material. firmly. thereon.' -The sleeve S being 4hollow extends over andbeyf'ind the tip lB ofthe core wire B and' preferablyiat Va ,slightv distance therefrom. The electricity owing'ifrom the lineA terminal K to the sleeve S isfcau'sed tb jump inthe atfmospheretotheline wire B,v4 this 'p roduces -an intensive effect -uponwell known principles. `The' screwing of the' cap Vcoiithe insulating -material forces thel gmull the 'same as Shown'in Fig. 5.

tainin J outwardlyjandin'sulates itfexaictly In `order-to .operate the' device, -thefplug vis-.asseinbled as alternative .construction as shcwn in ',Fig.

5. It is screwed into. the cylinder head in shownin Fig. 2,' orwith the `the ordinary manner andthe line wire' is l attachedfthereto and it operates in the usual manner therefrom'. When it iszdesired to reverse it the terminal M or K, as the case may be,-' `is changed 'to the' opposite ven d of the f plugv and' assembled in the vmanner shown'. 'Thereupon theproper adjustment' Vis-imade between the ground line terminal J fand the core wire B, it being readily un- 'derstoo'd .bypthose skilled in the art that 'such adjustment must be made within nar# row'limits, say aboutone-liftieth of an inch;` .The plug is thereupon screwed into the cyl:

inder head in' the usuall manner 'with the at each end, means i ended insulating` core iny the manner welll understood byr those skilled in the art.

f Havingy thu-s described my invention what I claim is l. In a double endedi'spark'plug, a spark# ing giground terminal at each end thereof, a core line provfded with a sparking terminal for connectinga line wire toeither end of saidcore line, and means for insulating Said core line at the end connected to `the linev wire from its corresponding ground terminal. i l. Y .Y

2. Ina double ended spark plug, a double traversed. by a core line, a. sparking ground terminal disposed at each end of said the corresponding end of the corel line, means for attaching aline 'wire at eachend of saidcoie line, an insulating sleeve adapt ed to be vsuperimposed over the end of the core line between the core line and its corresponding ground terminal and adapted to be held in place bythe means attaching the line wire to the core line.

3.' In a double ended spark plug, a sparking'g'round terminal cobinedwith a casing at each end thereof, a double ended insulat ing core traversed by a core line' carried by said casing, a screw' cap carrying aniinsulating sleeve adapted to be screwed over either end of said spark plug, said insulatspark plug to coact with projecting .4 ground terminal.

naamw 'ing sleeve, adapted for insertion between 4. In a double ended spark plug, a .double ended insulating core traversed by a core line and screw threaded at each end, a sparking ground terminal carried at either end or the casing vof Said spark plug and projecting into the opening thereof so as to vbe fin sparking proximity withsaid coreline,

`a screw cap adapted to screw over either end of said spark plug, an insulating sleeve carried by said screw cap and adapted to beI .tted over ythe end of said core line between the sparking ground terminal and said core line, and means for connecting said core line ,to the line wire.

f said .core line and .its corresponding sparks 5.. ,In a double; ended spark plug, a double 2 ended insulating core traversed by Aa core `line, a sparking groundterminal at each end 1or" said sparkplug carried by the casing and r.into the ,interior longitudinal openingvv oi'said casing andpartially circunifeientially surrounding said core line, means for attaching a line wire at either end of said core line,.means,for insulating`- said core line from .itscorresponding sparking In testimony whereoffI ysign this isp'ecication. f

ANDREW L. KULioKL; 

